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use std::fmt::{Debug, Display, Formatter, Result};
use crate::syntax::ast::keyword::Keyword;
use crate::syntax::ast::pos::Position;
use crate::syntax::ast::punc::Punctuator;
#[derive(Clone, PartialEq)]
/// Represents a token
#[derive(Debug)]
pub struct Token {
/// The token Data
pub data: TokenData,
/// Token position from original source code
pub pos: Position,
}
impl Token {
/// Create a new detailed token from the token data, line number and column number
pub fn new(data: TokenData, line_number: u64, column_number: u64) -> Token {
Token {
data: data,
pos: Position::new(line_number, column_number),
}
}
}
impl Display for Token {
fn fmt(&self, f: &mut Formatter) -> Result {
write!(f, "{}", self.data)
}
}
pub struct VecToken(Vec<Token>);
impl Debug for VecToken {
fn fmt(&self, f: &mut Formatter) -> Result {
let mut buffer = String::new();
for token in &self.0 {
buffer.push_str(&token.to_string());
}
write!(f, "{}", buffer)
}
}
#[derive(Clone, PartialEq, Debug)]
/// Represents the type of Token
pub enum TokenData {
/// A boolean literal, which is either `true` or `false`
BooleanLiteral(bool),
/// The end of the file
EOF,
/// An identifier
Identifier(String),
/// A keyword
Keyword(Keyword),
/// A `null` literal
NullLiteral,
/// A numeric literal
NumericLiteral(f64),
/// A piece of punctuation
Punctuator(Punctuator),
/// A string literal
StringLiteral(String),
/// A regular expression
RegularExpression(String),
/// A comment
Comment(String),
}
impl Display for TokenData {
fn fmt(&self, f: &mut Formatter) -> Result {
match self.clone() {
TokenData::BooleanLiteral(val) => write!(f, "{}", val),
TokenData::EOF => write!(f, "end of file"),
TokenData::Identifier(ident) => write!(f, "{}", ident),
TokenData::Keyword(word) => write!(f, "{}", word),
TokenData::NullLiteral => write!(f, "null"),
TokenData::NumericLiteral(num) => write!(f, "{}", num),
TokenData::Punctuator(punc) => write!(f, "{}", punc),
TokenData::StringLiteral(lit) => write!(f, "{}", lit),
TokenData::RegularExpression(reg) => write!(f, "{}", reg),
TokenData::Comment(comm) => write!(f, "/*{}*/", comm),
}
}
}